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Forum:Technical Questions & Answers
Topic:Fuel Pump Problems
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T O P I C     R E V I E W
akboyMy friends Prowler was hard starting when Hot. Pressure test showed 58psi when running, and dropped to 0psi when shut off. We just installed a Jefferson Auto fuel pump kit.
Now the pressure reads 50psi at idle and the needle flutters, and again drops to 0psi we turned off. Its even harder to start than before. Is there something we missed?
Do we try another fuel pump? Any suggestions would be appreciated.
robinI know one member had installed a new pump and it was still acting up. He went back in and the one gasket was not totally seated. Plus I'm sure you can contact Jefferson Auto they can offer up some suggestion .

robinGreat thread..
http://www.prowleronline.com/ubb/Forum2/HTML/003719.html

another

http://www.prowleronline.com/ubb/Forum2/HTML/005571.html

This message has been edited by robin on 06-02-2018 at 09:05 AM

padrooThe Prowler fuel pump has been know to be a weak spot in the fuel system. If it goes to "0" right after you shut the engine off it means you have a leak but it could be a leaking fuel injector causing the drop in pressure. Any leak in the system will cause it to loose it's prime.

If a fuel injector is leaking "REAL" bad you might be able to detect which one it is by pulling the spark plugs one at a time and smelling. Turn the key on but not to the start position three or four times and then smell.

They make a fuel injector leak down tester that will catch other fuel injector problems.
http://www.amazon.com/OTC-3398-Injection-Pulse-Tester/dp/B0002SR5OO


This is the one I own.

http://www.amazon.com/all-sun-EM276-Fuel-Injector-Tester/dp/B0126MEK3C

At the 8:15 mark this guy goes into how to use the tester.
http://www.youtube.com/watch?v=XhYEDkpF3Qs&list=PL-OJ-iRGCWFGHXJD15FSn6CKmN7r7nuPt

This message has been edited by padroo on 06-02-2018 at 11:24 AM

akboyPardoo, lots of good info, and pretty inexpensive tester.
Don,t know how it can work when immediately after the key is turned off pressure drops to zero. I only have pressure when engine is running.

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